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WO2022061782A1 - Procédé et appareil de retour d'informations d'état de canal, dispositif de terminal et support de stockage - Google Patents

Procédé et appareil de retour d'informations d'état de canal, dispositif de terminal et support de stockage Download PDF

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Publication number
WO2022061782A1
WO2022061782A1 PCT/CN2020/117934 CN2020117934W WO2022061782A1 WO 2022061782 A1 WO2022061782 A1 WO 2022061782A1 CN 2020117934 W CN2020117934 W CN 2020117934W WO 2022061782 A1 WO2022061782 A1 WO 2022061782A1
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WIPO (PCT)
Prior art keywords
csi
state information
channel state
reporting
frequency domain
Prior art date
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Ceased
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PCT/CN2020/117934
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English (en)
Chinese (zh)
Inventor
黄莹沛
陈文洪
史志华
方昀
田杰娇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to PCT/CN2020/117934 priority Critical patent/WO2022061782A1/fr
Priority to CN202080104508.XA priority patent/CN116097718B/zh
Publication of WO2022061782A1 publication Critical patent/WO2022061782A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present application relates to the field of wireless communication, and in particular, to a method, apparatus, terminal device and storage medium for feedback of channel state information.
  • a terminal device needs to feed back channel state information (Channel State Information, CSI) to a network device.
  • CSI Channel State Information
  • the embodiments of the present application provide a method, apparatus, terminal device, and storage medium for feedback of channel state information, which can reduce the overhead of CSI feedback.
  • the technical solution is as follows:
  • a method for feeding back channel state information is provided, which is applied to a terminal device, and the method includes:
  • an apparatus for feeding back channel state information comprising: a determining module, a generating module and a reporting module;
  • the determining module configured to determine the configured CSI-RS resources
  • the determining module is configured to determine all or part of the CSI-RS in the configured CSI-RS resources as the target CSI-RS;
  • the generating module configured to generate channel state information according to the measurement result of the target CSI-RS
  • the reporting module is configured to report the channel state information.
  • a terminal device comprising: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; The processor is configured to load and execute the executable instructions to implement the channel state information feedback method as described in the above aspects.
  • a computer-readable storage medium having executable instructions stored in the readable storage medium, the executable instructions being loaded and executed by a processor to implement the channel according to the above aspect Feedback method for status information.
  • a computer program product or computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium, the processor of the computer device being readable from the computer
  • the storage medium reads the computer instructions, and the processor executes the computer instructions, so that the computer device executes the channel state information feedback method described in the above aspects.
  • the terminal device can generate channel state information according to all or part of the CSI-RS, instead of only generating the channel state information according to all the CSI-RSs therein, thereby reducing the cost of the terminal device.
  • FIG. 1 is a block diagram of a communication system provided by an exemplary embodiment of the present application.
  • FIG. 2 is a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application
  • FIG. 3 is a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application
  • FIG. 4 is a schematic diagram of frequency division provided by an exemplary embodiment of the present application.
  • FIG. 5 is a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application
  • FIG. 6 is a schematic diagram of a terminal device using CSI-RS on a partial frequency band provided by an exemplary embodiment of the present application;
  • FIG. 7 is a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • FIG. 8 is a schematic diagram of frequency domain resource division provided by an exemplary embodiment of the present application.
  • FIG. 9 is a schematic diagram of frequency domain resources in the same frequency domain resource subset corresponding to the same beam provided by an exemplary embodiment of the present application.
  • FIG. 10 is a schematic diagram of a space-frequency vector provided by an exemplary embodiment of the present application.
  • FIG. 11 is a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • FIG. 12 is a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • FIG. 13 is a schematic diagram of grouping reporting of combining coefficients provided by an exemplary embodiment of the present application.
  • FIG. 14 is a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • FIG. 15 is a structural block diagram of an apparatus for feeding back channel state information provided by an exemplary embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application.
  • the communication system may include: an access network 12 and a terminal device 14 .
  • the access network 12 includes several network devices 120 .
  • the network device 120 may be a base station, which is a device deployed in an access network to provide a wireless communication function for a terminal.
  • the base station may include various forms of macro base station, micro base station, relay station, access point and so on.
  • the names of devices with base station functions may be different.
  • eNodeBs or eNBs In LTE systems, they are called eNodeBs or eNBs; in 5G NR-U systems, they are called gNodeBs or gNBs.
  • the description of "base station” may change.
  • the above-mentioned apparatuses for providing a wireless communication function for the terminal device 14 are collectively referred to as network devices.
  • the terminal device 14 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment, mobile stations (Mobile Station, MS) , terminal device, etc.
  • the network device 120 and the terminal device 14 communicate with each other through a certain air interface technology, such as a Uu interface.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • CDMA wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • evolution systems of NR systems LTE on unlicensed frequency bands (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to Everything
  • FIG. 2 shows a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the method can be applied to the terminal device as shown in FIG. 1 .
  • the method includes the following steps:
  • Step 210 Determine the configured CSI-RS resources.
  • the CSI-RS resource is a resource used to bear a channel state information reference signal (Channel State Information Reference Signal, CSI-RS), and the CSI-RS resource includes: at least one of CSI-RS time domain resources and CSI-RS frequency domain resources .
  • CSI-RS Channel State Information Reference Signal
  • the CSI-RS is a physical signal used for downlink channel sounding.
  • the network device can send the CSI-RS to the terminal device, the terminal device measures the CSI-RS, and reports the measurement result to the network device, so that the network device can configure appropriate sending parameters for subsequent downlink transmission according to the measurement result.
  • the CSI-RS resource is configured by the network device, and the terminal device may determine the CSI-RS on the configured CSI-RS resource.
  • Step 220 Determine all or part of the CSI-RS in the configured CSI-RS resources as the target CSI-RS.
  • the target CSI-RS is the CSI-RS used by the terminal equipment to determine the channel state information.
  • the terminal equipment can determine all or part of the CSI-RS in the configured CSI-RS resources through different dimensions, and use all or part of the CSI-RS as the target CSI-RS .
  • the above-mentioned different dimensions may refer to: the dimension of the antenna port, the terminal device uses all CSI-RS as the target CSI-RS, and expands the number of antenna ports that all CSI-RS can correspond to; it may refer to: the dimension of the frequency band , the terminal device uses the CSI-RS on the partial frequency band as the target CSI-RS.
  • the target CSI-RS is predefined in a standard, or configured by a high-layer parameter, or indicated by a network device, which is not limited in this embodiment of the present application.
  • Step 230 Generate channel state information according to the measurement result of the target CSI-RS.
  • the terminal device After the target CSI-RS is determined, the terminal device measures the target CSI-RS to obtain a measurement result, and generates channel state information according to the measurement result.
  • Step 240 reporting channel state information.
  • the terminal device reports the generated channel state information to the network device.
  • the terminal device can generate channel state information according to all or part of the CSI-RS, rather than only based on the CSI-RS resources. All the CSI-RS of the CSI-RS generate channel state information, thereby reducing the overhead of the terminal equipment feeding back the channel state information.
  • the terminal device can expand the number of antenna ports corresponding to all CSI-RSs in the configured CSI-RS resources.
  • FIG. 3 shows a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the method can be applied to the terminal device as shown in FIG. 1 .
  • step 220 is replaced by step 221:
  • Step 221 Use all CSI-RSs in the configured CSI-RS resources as target CSI-RSs.
  • the target CSI-RS in each resource block (Resource Block, RB) group in one subband corresponds to different antenna ports by frequency division; or, the target CSI-RS in adjacent RBs corresponds to by frequency division Different antenna ports.
  • the granularity of frequency division may be an RB group in a subband, or a single RB.
  • the first RB group in a subband corresponds to the first antenna port
  • the second RB group corresponds to the second antenna port; or, in two adjacent RBs, the first RB corresponds to the first antenna port, the second RB corresponds to the second antenna port.
  • the above two cases will be exemplarily described respectively.
  • the target CSI-RS in each RB group in one subband corresponds to different antenna ports in a frequency division manner.
  • the RB group includes: consecutive N RBs in a subband, or N alternate RBs in a subband.
  • the RB group including N RBs alternated in a subband refers to: in the N RBs in an RB group, there is a preset interval between any two adjacent RBs.
  • the network device configures the number of antenna ports P CSI-RS of the CSI-RS, and the terminal device can expand the number of antenna ports corresponding to the CSI-RS by means of frequency division.
  • the number of antenna ports corresponding to the CSI-RS is P'.
  • P' is the number of ports corresponding to the target CSI-RS after frequency division
  • P CSI-RS is the number of ports corresponding to the target CSI-RS configured by the network device
  • N is the number of RBs included in one RB group.
  • the number of antenna ports P CSI-RS of the target CSI-RS configured by the network device is 4, including: antenna port 3000, antenna port 3001, antenna port 3002, and antenna port 3003;
  • the number of antenna ports after the expansion is 8, and the following antenna ports are newly added: antenna port 3004, antenna port 3005, antenna port 3006, and antenna port 3007.
  • a subband includes 4 RBs, and 2 consecutive RBs in each subband are divided into 1 RB group, then the CSI-RS in RB 0 and RB 1 correspond to Antenna port 3000 to antenna port 3003, CSI-RS in RB 2 and RB 3 correspond to antenna port 3004 to antenna port 3007.
  • a subband includes 4 RBs, and the alternate 2 RBs in each subband are divided into 1 RB group, then the CSI-RS in RB 0 and RB 2 correspond to Antenna port 3000 to antenna port 3003, CSI-RS in RB 1 and RB 3 correspond to antenna port 3004 to antenna port 3007.
  • the CSI-RS in the i-th RB group corresponds to the antenna port x+i ⁇ P CSI-RS .
  • the CSI-RS in the next RB group corresponds to antenna port 3004.
  • the target CSI-RSs in adjacent RBs correspond to different antenna ports by frequency division.
  • the antenna port is determined by the sequence number of the RB, regardless of the subband in which the RB is located.
  • CSI-RS in RB 0, RB 2, RB 4, RB 6, RB 8 and RB 10 correspond to antenna port 3000 to antenna port 3003, RB 1, RB 3, RB 5, RB 7, RB 9 and RB 11 in CSI-RS corresponds to antenna port 3004 to antenna port 3007.
  • the CSI-RS corresponds to more antenna ports by means of frequency division, which increases the accuracy of the channel measurement performed by the terminal device according to the CSI-RS.
  • the bandwidth occupied by the CSI-RS of each terminal device can be reduced.
  • FIG. 5 shows a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the method can be applied to the terminal device as shown in FIG. 1 .
  • step 220 is replaced by step 2221 or step 2222 or step 2223:
  • Step 2221 in the configured CSI-RS resources, use the CSI-RS in the partial bandwidth as the target CSI-RS.
  • Step 2222 in the configured CSI-RS resources, use the CSI-RS in some RBs as the target CSI-RS.
  • Step 2223 In the configured CSI-RS resources, use the CSI-RS in some subbands as the target CSI-RS.
  • the terminal device determines part of the CSI-RS in the configured CSI-RS resources as the target CSI-RS.
  • the terminal device may use the bandwidth or subband or RB as the granularity, and use the CSI-RS in the partial bandwidth or subband or RB as the target CSI-RS.
  • the target CSI-RS is indicated by first downlink control information (Downlink Control Information, DCI) sent by the network device; or, the target CSI-RS is indicated by a high layer parameter. That is to say, the first DCI that may be sent by the network device, or a high-layer parameter, indicates the use of CSI-RS on part of the frequency band.
  • DCI Downlink Control Information
  • the number of antenna ports P CSI-RS of the target CSI-RS configured by the network device is 4, including: antenna port 3000 , antenna port 3001 , antenna port 3002 and antenna port 3003 .
  • the network device allocates RB 0, RB 2, RB 4, RB 6, RB 8 and RB 10 to the terminal device, and the terminal device uses the CSI-RS in RB 0, RB 2, RB 4, RB 6, RB 8 and RB 10 as Target CSI-RS, measure the target CSI-RS.
  • the method provided in this embodiment can reduce the bandwidth occupied by the CSI-RS of each terminal device by using the CSI-RS on part of the frequency band.
  • the terminal equipment divides the frequency domain resources into several frequency domain resource subsets.
  • FIG. 7 shows a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the method can be applied to the terminal device as shown in FIG. 1 .
  • step 240 is replaced by step 2411, step 2412, and step 2413:
  • Step 2411 Divide the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets.
  • the terminal device divides the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets.
  • the lengths of the frequency domain resources included in each frequency domain resource subset may be the same or different, which is not limited in this embodiment of the present application.
  • the unit of the frequency domain resource is an RB; or, the unit of the frequency domain resource is a subband.
  • the terminal equipment can divide frequency domain resource subsets with RB granularity, and one frequency domain resource subset includes one or more RBs; it can also divide frequency domain resource subsets with subband granularity, and one frequency domain resource subset includes one frequency domain resource subset. or multiple subbands.
  • the frequency domain resources in the frequency domain resource subset are continuous frequency domain resources; or, the frequency domain resources in the frequency domain resource subset are comb-shaped frequency domain resources.
  • the comb-shaped frequency domain resources refer to: different frequency domain resource subsets are alternated in the frequency domain.
  • consecutive frequency domain resource 0, frequency domain resource 1, frequency domain resource 2 and frequency domain resource 3 belong to the same frequency domain resource subset
  • consecutive frequency domain resource 4 frequency domain resource 5, frequency domain resource 3 Resource 6 and frequency domain resource 7 belong to the same frequency domain resource subset
  • consecutive frequency domain resource 8 frequency domain resource 9, frequency domain resource 10 and frequency domain resource 11 belong to the same frequency domain resource subset.
  • the interleaved frequency domain resource 0, frequency domain resource 3, frequency domain resource 6, and frequency domain resource 9 belong to the same frequency domain resource subset
  • the interleaved frequency domain resource 1, frequency domain resource 4, frequency domain resource 9 Domain resource 7 and frequency domain resource 10 belong to the same frequency domain resource subset
  • interleaved frequency domain resource 2 frequency domain resource 5, frequency domain resource 8 and frequency domain resource 11 belong to the same frequency domain resource subset.
  • the frequency domain resources belonging to the same frequency domain resource subset correspond to the same vector.
  • Antenna port 1 corresponds to a vector f1 and a vector f2
  • the vector f1 corresponds to one frequency domain resource subset
  • the vector f2 corresponds to another frequency domain resource subset.
  • Antenna port 2 corresponds to vector f3 and vector f4, vector f3 corresponds to one subset of frequency domain resources, and vector f4 corresponds to another subset of frequency domain resources.
  • Step 2412 Select K space-frequency vectors from the PM space-frequency vectors, and report the combining coefficients corresponding to the K space-frequency vectors.
  • P is a positive integer.
  • the M frequency domain resource subsets and the P antenna ports form PM space-frequency vectors.
  • the terminal device selects among the PM space-frequency vectors, selects K space-frequency vectors, and reports combining coefficients corresponding to the K space-frequency vectors.
  • 4 frequency domain resource subsets and 8 antenna ports form 32 space-frequency vectors.
  • the terminal equipment selects from 32 space-frequency vectors, selects 4 space-frequency vectors, and reports the combining coefficients corresponding to the 4 space-frequency vectors.
  • Step 2413 Select K/2 space-frequency vectors from PM/2 space-frequency vectors with the same polarization direction, and report the combining coefficients corresponding to the K/2 space-frequency vectors.
  • the M frequency domain resource subsets and the P antenna ports form PM/2 space-frequency vectors with the same polarization direction.
  • the terminal device selects among PM/2 space-frequency vectors, selects K/2 space-frequency vectors, and reports combining coefficients corresponding to the K/2 space-frequency vectors.
  • 4 frequency domain resource subsets and 8 antenna ports form 16 space-frequency vectors with the same polarization direction.
  • the terminal equipment selects from 16 space-frequency vectors, selects two space-frequency vectors, and reports the combining coefficients corresponding to the two space-frequency vectors.
  • the frequency domain resources corresponding to the configured CSI-RS resources are divided into M frequency domain resource subsets, so that one antenna port can correspond to multiple vectors, and the frequency domain compression, while reducing the overhead of CSI-RS resources.
  • the channel state information reported by the terminal equipment may include: combining coefficients.
  • the terminal device When reporting the combining coefficient, the terminal device needs to quantize the combining coefficient, and then report the quantized combining coefficient. Next, the quantization of the combining coefficients will be exemplarily explained.
  • FIG. 11 shows a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the method can be applied to the terminal device as shown in FIG. 1 .
  • step 240 is replaced by step 2421 or step 2422:
  • Step 2421 Determine a first mapping relationship of the merging coefficients according to the maximum number of ports configured by the network device; and report the merging coefficients according to the first mapping relationship.
  • Step 2422 Determine the second mapping relationship of the combining coefficients according to the threshold value.
  • the second mapping relationship includes: a first sub-mapping relationship corresponding to the combining coefficients within the threshold value, and a first sub-mapping relationship corresponding to the combining coefficients outside the threshold value. Two sub-mapping relationships; report the merging coefficient according to the second mapping relationship.
  • the channel state information includes a combining coefficient, which is a weighting coefficient corresponding to the space-frequency vector reported by the terminal device.
  • the combining coefficient includes at least one of an amplitude coefficient and a phase coefficient.
  • the amplitude coefficient includes: at least one of the quantization step size of the amplitude coefficient and the number of quantized bits of the amplitude coefficient;
  • the phase coefficient includes: at least one of the phase shift keying mode of the phase coefficient and the number of quantized bits of the phase coefficient. kind.
  • the terminal device obtains the mapping relationship, and reports the combining coefficient according to the mapping relationship.
  • the mapping relationship includes: a first mapping relationship related to the maximum number of ports configured by the network device.
  • the merging coefficient changes with the maximum number of ports configured by the network device, such as: the quantization step size of the amplitude coefficient changes with the maximum number of ports; the quantization bit number of the amplitude coefficient changes with the maximum number of ports; the phase shift key of the phase coefficient
  • the control method changes with the maximum number of ports; the number of quantization bits of the phase coefficient changes with the maximum number of ports.
  • the quantization step size of the amplitude coefficients can be different.
  • the quantization step of the amplitude coefficient is -3dB; when the maximum number of ports is 16, the quantization step of the amplitude coefficient is -1.5dB; when the maximum number of ports is 2, the quantization step of the amplitude coefficient is The length is -0.75dB.
  • the number of quantization bits of the amplitude coefficient may be different.
  • the maximum number of ports is 32
  • the number of quantized bits of the amplitude coefficient is 3 bits; when the maximum number of ports is 8, the number of quantized bits of the amplitude coefficient is 2 bits; when the maximum number of ports is 2 or 4, the number of quantized bits of the amplitude coefficient is 1 bit.
  • the mapping relationship includes: a second mapping relationship related to the threshold value.
  • the threshold value may be pre-defined in a standard, or may be configured by a high-level parameter, which is not limited in this embodiment of the present application.
  • the second mapping relationship includes: a first sub-mapping relationship corresponding to merging coefficients within the threshold value, and a second sub-mapping relationship corresponding to merging coefficients outside the threshold value. That is to say, the terminal device reports the combining coefficients within the threshold value according to the first sub-mapping relationship; and reports the combining coefficients outside the threshold value according to the second sub-mapping relationship.
  • the threshold value is 4.
  • 4 merging coefficients are quantized using 3 bits (corresponding to the first sub-mapping relationship), and other merging coefficients are quantized using 2 bits (corresponding to the second sub-mapping relationship).
  • the amplitude coefficients correspond to the phase coefficients in a combined relationship.
  • the corresponding combination relationship between the amplitude coefficient and the phase coefficient means that the quantization method of the amplitude coefficient is related to the quantization method of the phase coefficient, and the quantization method of the amplitude coefficient and the quantization method of the phase coefficient form a fixed combination.
  • Phase Coefficient/Amplitude Coefficient 3 bits 2 bits 1 bit 16PSK YES 8PSK YES YES QPSK YES YES
  • the amplitude coefficient can be quantized by 3 bits; when the phase coefficient adopts 8 Phase Shift Keying (8 Phase Shift Keying, 8PSK), the amplitude coefficient can be quantized by 3bit or 2bit; when the phase coefficient is using Quadrature Phase Shift Keying (QPSK), the amplitude coefficient can be quantized by 2bit or 1bit.
  • QPSK Quadrature Phase Shift Keying
  • the channel state information may include combining coefficients.
  • a first mapping relationship and a second mapping relationship are provided for the quantization of the combining coefficients.
  • One of the second mapping relationships reports the combining coefficient, which improves the flexibility of the feedback method of the channel state information.
  • FIG. 12 shows a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the method can be applied to the terminal device as shown in FIG. 1 .
  • step 240 is replaced by step 243:
  • Step 243 Report at least one of the first channel state information and the second channel state information according to the indication of the second DCI sent by the network device.
  • the first channel state information includes: port indication, frequency domain resource subset indication, discrete Fourier transform (Discrete Fourier Transform, DFT) indication, at least one of the number of non-zero coefficients and the number of layers ;
  • the second channel state information includes: a combining coefficient, where the combining coefficient includes at least one of an amplitude coefficient and a phase coefficient.
  • the port indication is used to instruct the terminal equipment to report the selected port
  • the frequency domain resource subset indication is used to indicate the frequency domain resource subset selected by the terminal equipment
  • the DFT vector indication is used to indicate the frequency domain vector reported by the terminal equipment
  • the non-zero coefficients refer to the coefficients that are not 0 in the reported combining coefficients
  • the number of layers refers to the number of layers used for transmission between the terminal device and the network device
  • the combining coefficients correspond to the space-frequency vector reported by the terminal device Weighting factor.
  • the indication of the port can also be implemented as a bitmap or combined indication for determining the position of the non-zero coefficients.
  • the channel state information may be composed of two parts, including the first channel state information and the second channel state information.
  • the terminal device may determine to report part of the channel state information or all of the channel state information according to the indication of the second DCI from the network device. It can be understood that the channel state information may also include other parts, and the first state information and the second state information may also include other information, which is not limited in this embodiment of the present application.
  • the terminal device reports the first channel state information through a physical uplink control channel (Physical Uplink Control Channel, PUCCH); or reports the second channel through a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) state information; or, reporting the first channel state information and the second channel state information through the PUSCH. That is, when the terminal device reports the channel state information, the first channel state information is transmitted on the PUCCH, or the second channel state information is transmitted on the PUSCH, or the first channel state information and the second channel state information are transmitted on the PUSCH .
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the terminal device reporting at least one of the first channel state information and the second channel state information includes: the terminal device determines a port selection set, and the port selection set includes the antenna ports indicated by the network device; At least one antenna port is selected from the port selection set; a combining coefficient corresponding to the at least one antenna port is determined; and the combining coefficient is reported.
  • the antenna ports in the port selection set are used for the terminal device to select the antenna ports.
  • the port selection set includes: antenna port 1, antenna port 2, and antenna port 3.
  • the terminal device may select at least one antenna port from the above-mentioned three antenna ports, and report the combining coefficient corresponding to the selected antenna port.
  • the terminal device may determine the port selection set in any of the following manners: the terminal device determines the port selection set according to the indication of the third DCI sent by the network device; The indication of the medium access control control element (Medium Access Control Control Element, MAC CE) is to determine the port selection set; or, according to the port selection set used in the previous report, determine the port selection set used in this report.
  • the indication of the medium access control control element (Medium Access Control Control Element, MAC CE) is to determine the port selection set; or, according to the port selection set used in the previous report, determine the port selection set used in this report.
  • the port selection set is indicated in the form of a bitmap.
  • the terminal device when reporting the combining coefficient, adopts multiple reports: the terminal device divides the combining coefficient into at least one reporting group; and reports first indication information, where the first indication information is used to notify the network device to associate Reporting group.
  • the terminal device may report the first indication information to the network device after completing the reporting of the at least one reporting group; it may also report the first indication information to the network device before reporting the at least one reporting group; or The first indication information may be reported to the network device in the process of reporting at least one reporting group, and the embodiment of the present application does not limit the reporting timing of the first indication information.
  • the terminal device divides the combining coefficients into two reporting groups, one reporting group includes: combining coefficients corresponding to CSI-RS port X, and the other reporting group includes: combining coefficients corresponding to CSI-RS port Y.
  • the terminal equipment reports the first reporting group for the first time, and reports the second reporting group for the second time.
  • the network device associates the two reporting groups according to the indication of the first indication information of the terminal device, and subsequently uses the CSI-RS port X+Y to perform physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) precoding.
  • Physical Downlink Shared Channel Physical Downlink Shared Channel
  • the terminal device reports the combining coefficient by means of differential reporting.
  • the differential reporting refers to: setting a reference combining coefficient, and reporting the combining coefficient by reporting the difference from the reference coefficient.
  • p 0 3bit amplitude quantization c 0 is 16PSK.
  • the terminal device only needs to report the amplitude difference value p x and the phase difference value c x , and then the differential reporting of the combining coefficient h 1 can be realized.
  • the amplitude difference value p x ⁇ ⁇ -X, 0, X, Y ⁇ , and the phase difference value c x is QPSK.
  • X and Y are the db values of the magnitude.
  • the channel state information may be composed of two parts, including the first channel state information and the second channel state information, and the terminal device may determine to report according to the indication of the second DCI from the network device When only a part of the channel state information is reported, the overhead of a single feedback is reduced.
  • FIG. 14 shows a flowchart of a method for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the method can be applied to the terminal device as shown in FIG. 1 .
  • step 240 is replaced by step 2441 and step 2442:
  • Step 2441 Report second indication information, where the second indication information is used to indicate the codebook type when reporting the channel state information to the network device.
  • the terminal device can use different codebook types to report the channel state information, the terminal device independently selects the codebook type used, and indicates the codebook type when the network device reports the channel state information by itself in the form of second indication information.
  • the codebook type includes: a codebook type defined for channel state information by 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) protocol R16, and a codebook type defined by 3GPP protocol R17 for channel state information Codebook type.
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • Step 2442 reporting the channel state information by using the codebook corresponding to the codebook type.
  • the terminal device determines the codebook type used to report the channel state information according to whether the beam sent by the network device is accurate, and reports the channel state information by using the codebook corresponding to the determined codebook type.
  • the direction of the beam actually sent may be different from the ideal beam direction.
  • the terminal device supports judging whether the beam sent by the network device is accurate.
  • the terminal device when the CSI-RS sent by the network device adopts an accurate beam, the terminal device sends second indication information to the network device, indicating that the codebook type when the terminal device reports the channel state information is the 3GPP protocol R17 defined for the channel state information. codebook type.
  • the terminal device when the CSI-RS sent by the network device adopts an inaccurate beam, the terminal device sends second indication information to the network device, indicating that the codebook type when the terminal device reports the channel state information is 3GPP protocol R16 is the channel state information.
  • the defined codebook type when the CSI-RS sent by the network device adopts an inaccurate beam, the terminal device sends second indication information to the network device, indicating that the codebook type when the terminal device reports the channel state information is 3GPP protocol R16 is the channel state information.
  • the defined codebook type when the CSI-RS sent by the network device adopts an inaccurate beam.
  • the terminal device can adjust the codebook type when reporting the channel state information according to whether the beam used by the network device is accurate, and send the second indication information to the network device to notify the network in time. equipment.
  • the steps performed by the terminal device can be implemented independently as a method for feeding back channel state information on the terminal device side
  • the steps performed by the network device can be implemented independently as a method for feeding back channel state information on the network device side .
  • FIG. 15 shows a structural block diagram of an apparatus for feeding back channel state information provided by an exemplary embodiment of the present application.
  • the apparatus may be implemented as a terminal device, or may be implemented as a part of the terminal device.
  • the apparatus includes: a determining module 1501, generating module 1502 and reporting module 1503;
  • a determining module 1501 configured to determine configured CSI-RS resources
  • a determining module 1501 configured to determine all or part of the CSI-RS in the configured CSI-RS resources as the target CSI-RS;
  • a generating module 1502 configured to generate channel state information according to the measurement result of the target CSI-RS
  • the reporting module 1503 is used for reporting channel state information.
  • the determining module 1501 is configured to use all the CSI-RSs in the configured CSI-RS resources as the target CSI-RSs; wherein, in each resource block RB group in a subband, the The target CSI-RS corresponds to different antenna ports through frequency division; or, the target CSI-RS in adjacent RBs corresponds to different antenna ports through frequency division.
  • the RB group includes: consecutive N RBs in a subband, or N alternate RBs in a subband.
  • P' is the number of ports corresponding to the target CSI-RS after frequency division
  • P CSI-RS is the number of ports corresponding to the target CSI-RS configured by the network device, is the number of RBs in a subband.
  • the determining module 1501 is configured to use, in the configured CSI-RS resources, a CSI-RS in a part of the bandwidth as the target CSI-RS; or, the determining module 1501 is configured to use the configured CSI-RS resources - In the RS resource, use the CSI-RS in some RBs as the target CSI-RS; or, the determining module 1501 is configured to use the CSI-RS in some subbands as the target CSI-RS in the configured CSI-RS resources .
  • the target CSI-RS is indicated by the first downlink control information DCI sent by the network device; or, the target CSI-RS is indicated by a high layer parameter.
  • the determining module 1501 is configured to divide the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets, where M is a positive integer, and the M frequency domain resource subsets are the same as the
  • the P antenna ports form PM space-frequency vectors, or PM/2 space-frequency vectors with the same polarization direction, where P is a positive integer;
  • the reporting module 1503 is used to select K space-frequency vectors from the PM space-frequency vectors , report the combining coefficients corresponding to the K space-frequency vectors, where K is a positive integer; or, the reporting module 1503 is used to select K/2 space-frequency vectors from PM/2 space-frequency vectors with the same polarization direction, and report K Combining coefficients corresponding to /2 space-frequency vectors.
  • the frequency domain resources in the frequency domain resource subset are continuous frequency domain resources; or, the frequency domain resources in the frequency domain resource subset are comb-shaped frequency domain resources.
  • the unit of the frequency domain resource is an RB; or, the unit of the frequency domain resource is a subband.
  • the channel state information includes: a combining coefficient, where the combining coefficient includes at least one of an amplitude coefficient and a phase coefficient; the determining module 1501 is configured to determine a value of the combining coefficient according to the maximum number of ports configured by the network device the first mapping relationship; the reporting module 1503 is used to report the combined coefficient according to the first mapping relationship; or, the determining module 1501 is used to determine the second mapping relationship of the combined coefficient according to the threshold value, the second mapping relationship includes: an AND gate The first sub-mapping relationship corresponding to the merging coefficients within the threshold value is the second sub-mapping relationship corresponding to the merging coefficients outside the threshold value; the reporting module 1503 is configured to report the merging coefficients according to the second mapping relationship.
  • the amplitude coefficient includes: at least one of a quantization step size of the amplitude coefficient and the number of quantization bits of the amplitude coefficient;
  • the phase coefficient includes: a phase shift keying method of the phase coefficient and a quantization bit of the phase coefficient at least one of the numbers.
  • the amplitude coefficients correspond to the phase coefficients in a combined relationship.
  • the channel state information includes: first channel state information and second channel state information; a reporting module 1503, configured to report the first channel state information and At least one of the second channel state information; wherein the first channel state information includes: at least one of port indication, frequency domain resource subset indication, DFT vector indication, number of non-zero coefficients and number of layers
  • the second channel state information includes: a combining coefficient, where the combining coefficient includes at least one of an amplitude coefficient and a phase coefficient.
  • the reporting module 1503 is configured to report the first channel state information through the PUCCH; or, the reporting module 1503 is configured to report the second channel state information through the PUSCH; or, the reporting module 1503 is configured to report the second channel state information through the PUSCH
  • the PUSCH reports the first channel state information and the second channel state information.
  • the determining module 1501 is configured to determine a port selection set, where the port selection set includes the antenna ports indicated by the network device; the determining module 1501 is configured to select at least one antenna port from the port selection set; determine The module 1501 is used for determining the combining coefficient corresponding to at least one antenna port; the reporting module 1503 is used for reporting the combining coefficient.
  • the determining module 1501 is configured to determine the port selection set according to the indication of the third DCI sent by the network device; or, the determining module 1501 is configured to determine the port selection set according to the indication of the MAC CE sent by the network device. a port selection set; or, the determining module 1501, configured to determine the port selection set used in the current report according to the port selection set used in the previous report.
  • the determining module 1501 is configured to divide the combining coefficients into at least one reporting group; the reporting module 1503 is configured to report first indication information, where the first indication information is used to notify the network device to associate the reporting group.
  • the reporting module 1503 is configured to report the combining coefficient by means of differential reporting.
  • the reporting module 1503 is used to report the second indication information, and the second indication information is used to indicate to the network device the type of the codebook when reporting the channel state information; the reporting module 1503 is used to use the codebook The codebook corresponding to the type reports the channel state information.
  • FIG. 16 shows a schematic structural diagram of a communication device (terminal device or network device) provided by an exemplary embodiment of the present application.
  • the communication device includes: a processor 101 , a receiver 102 , a transmitter 103 , a memory 104 and a bus 105 .
  • the processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.
  • the receiver 102 and the transmitter 103 may be implemented as a communication component, which may be a communication chip.
  • the memory 104 is connected to the processor 101 through the bus 105 .
  • the memory 104 may be configured to store at least one instruction, and the processor 101 may be configured to execute the at least one instruction, so as to implement various steps in the foregoing method embodiments.
  • memory 104 may be implemented by any type or combination of volatile or non-volatile storage devices including, but not limited to, magnetic or optical disks, electrically erasable programmable Read Only Memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Random Access Memory (SRAM), Read Only Memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
  • volatile or non-volatile storage devices including, but not limited to, magnetic or optical disks, electrically erasable programmable Read Only Memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Random Access Memory (SRAM), Read Only Memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
  • a computer-readable storage medium stores at least one instruction, at least one piece of program, code set or instruction set, the at least one instruction, the At least one section of program, the code set or the instruction set is loaded and executed by the processor to implement the method for feeding back channel state information provided by the above method embodiments and executed by the communication device.
  • a computer program product or computer program comprising computer instructions stored in a computer readable storage medium from which a processor of a computer device can retrieve Reading the storage medium reads the computer instructions, and the processor executes the computer instructions, so that the computer device executes the channel state information feedback method described in the above aspects.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande, qui appartient au domaine des communications sans fil, concerne un procédé et un appareil de retour d'informations d'état de canal (CSI), un dispositif de terminal et un support de stockage. Le procédé est appliqué au dispositif de terminal. Le procédé comprend : la détermination d'une ressource CSI-RS configurée ; la détermination, à partir de la ressource CSI-RS configurée, de l'intégralité ou d'une partie d'un signal CSI-RS en tant que signal CSI-RS cible ; la génération d'informations CSI selon un résultat de mesure du signal CSI-RS cible ; et le rapport des informations CSI.
PCT/CN2020/117934 2020-09-25 2020-09-25 Procédé et appareil de retour d'informations d'état de canal, dispositif de terminal et support de stockage Ceased WO2022061782A1 (fr)

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CN202080104508.XA CN116097718B (zh) 2020-09-25 2020-09-25 信道状态信息的反馈方法、装置、终端设备和存储介质

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WO2025119297A1 (fr) * 2023-12-08 2025-06-12 华为技术有限公司 Procédé de communication et appareil associé

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